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3 Responses

404 errors are not necessarily a bad thing, as long as they are known about.

GWT shows you both internal and inbound links that are broken/bad linking within/to your site. If GWT shows you 404s that are inbound links, if those pages no longer exist, then a 404 is fine. If you have similar content you could 301 redirect the 404 page to a new, applicable one. If there isn't an applicable one, it is fine having a 404. If you have internal links that are 404-ing, you need to fix them, because that is showing Google you don't care about having a quality site.

The Moz Crawl Diagnostics shows you, "4xx status codes are shown when the client requests a page that cannot be accessed. This is usually the result of a bad or broken link."

If Moz tools is reporting 404 errors on your website, that means that you have internal links that are broken.

When diagnosing broken links, I like to run ScreamingFrog, which scans your site in real-time, which is nice to fix broken links and then validate you don't have any issues.

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